Microbead Immunoassay Imaging for Portable Whole Blood Analysis
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Solution Overview
Problem
Traditional methods for performing both a complete blood count (CBC) and chemical analysis of blood components require large, expensive laboratory equipment and take hours or days to complete, making them unsuitable for point-of-care applications.
Innovation Solution
A portable, inexpensive device that uses an image sensor with an array of light-sensitive elements to capture images of beads bound to antibodies, allowing for rapid enumeration and identification of chemical components in whole blood, enabling simultaneous CBC and chemical analysis on a small sample.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional laboratory equipment is used for CBC and chemical analysis, then measurement precision and reliability are improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent segments the analysis system into discrete functional components: microbeads with embedded antibodies serve as portable detection units, each capable of specific antigen binding. This segmentation allows the complex analysis function to be distributed across many simple, identical units rather than requiring one complex centralized instrument.
Solution Approach 2:
The patent introduces microbeads as an intermediary between the sample and the detection system. These beads carry antibodies that bind to target antigens, translating chemical information into physical signals (light scattering, fluorescence) that can be detected by simple optical sensors, thereby bridging the gap between complex chemical analysis and simple detection.
2Measurement precision
If traditional laboratory methods are used, then comprehensive analysis is achieved, but analysis time increases to hours or days
Solution Approach 1:
The patent performs preliminary action by pre-attaching specific antibodies to the microbeads before sample introduction. This pre-preparation of detection agents eliminates the need for time-consuming setup procedures during actual analysis, allowing immediate binding and detection upon sample addition.
Solution Approach 2:
The patent enables continuous useful action through parallel processing of multiple analytes simultaneously. Since each microbead type can bind to a different target antigen, the system performs multiple analyses in parallel rather than sequentially, dramatically reducing total analysis time while maintaining comprehensive coverage.
3Measurement precision
If traditional laboratory equipment is deployed, then diagnostic capability is improved, but portability and ease of distribution deteriorate
Solution Approach 1:
The patent employs disposable microbeads as single-use detection elements that can be mass-produced at low cost. Each bead carries pre-attached antibodies and can be discarded after one use, eliminating the need for expensive, reusable laboratory equipment while maintaining diagnostic capability. This approach prioritizes ease of distribution over device durability.
Solution Approach 2:
The patent uses optical detection methods that create light scattering patterns or fluorescence signals as copies of the antigen-antibody binding events. These optical copies can be detected by simple, portable image sensors without requiring the original complex laboratory instrumentation, enabling diagnostic capability in portable formats.
4Device complexity
If simple portable devices are used, then device complexity and cost are reduced, but measurement precision and reliability may worsen
Solution Approach 1:
The patent merges multiple detection functions into a single integrated microbead system. Each bead contains the antibody, the binding site, and the optical detection marker (fluorophore or light-scattering property) combined in one unit. This merging ensures that the simple portable device maintains reliability through the robustness of the integrated bead design rather than through complex instrumentation.
Solution Approach 2:
The patent utilizes color changes or light scattering property changes of the microbeads as direct indicators of antigen binding. When antibodies on the bead surface bind to target antigens, the beads exhibit detectable optical changes that can be measured by simple image sensors, providing reliable quantitative information without complex measurement systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables rapid, cost-effective performance of CBC and chemical analysis of whole blood at the point-of-care, using a small, portable device that can be distributed widely, reducing the need for large equipment and accelerating result turnaround time.
Implementation Method 1
The received light includes light reflected by, refracted by, or transmitted through the beads
Implementation Method 2
The received light includes light reflected by, refracted by, or transmitted through the beads
Implementation Method 3
The received light includes light reflected by, refracted by, or transmitted through the beads
Implementation Method 4
two or more different antibodies are caused to bind to each unit of one or more units of a chemical component in a sample
Data Source
AI summary
Among other things, two or more different antibodies are caused to bind to one or more units of a chemical component in a sample. Each of the antibodies is attached to one or more beads (e.g., microbeads). The sample is situated on a surface of an image sensor. At the image sensor, light is received originating at a light source that is other than the beads. The received light includes light reflected by, refracted by, or transmitted through the beads. At least one image of the sample is processed to separately enumerate individual beads and complexes of two or more of the beads attached to the two or more antibodies that are bound to a unit of the chemical component. The results of the processing are used to identify a presence or a level of the chemical component in the sample.